from PIL import Image, ImageEnhance
import numpy as np
import matplotlib.pyplot as plt
import cv2
import os
import pandas as pd
import math

import requests
import json
import re
import csv

directory_path = os.getcwd()
parent_directory_path = os.path.dirname(directory_path)
csv_path = os.path.join(parent_directory_path, 'Model\\condo_data_new_FINAL_test.csv')
gt_masked_image_path = os.path.join(parent_directory_path, 'Model\\clear\\test')
generated_image_path = os.path.join(parent_directory_path, 'Model\\clear\\final_clear_output_3') 

# Read the CSV file
data = pd.read_csv(csv_path)

# Function to extract the numeric part of the filename
def extract_numeric_part(filename):
    numeric_part = ''.join(filter(str.isdigit, filename))
    return int(numeric_part) if numeric_part else None

def create_binary_mask(arr, target_color, threshold=30):
    lower_bound = np.array(target_color) - threshold
    upper_bound = np.array(target_color) + threshold
    mask = (arr[:, :, :3] >= lower_bound) & (arr[:, :, :3] <= upper_bound)
    return np.all(mask, axis=-1)

def extract_building_regions(arr, target_color, threshold=10):
    lower_bound = np.array(target_color) - threshold
    upper_bound = np.array(target_color) + threshold
    mask = (arr[:, :, :3] >= lower_bound) & (arr[:, :, :3] <= upper_bound)
    return np.all(mask, axis=-1)

# def find_max_building_storeys(gpr):
#     max_building_storeys= 0
#     if gpr >= 0 and gpr < 1.4:
#         max_building_storeys = 5
#     elif gpr >= 1.4 and gpr < 1.6:
#         max_building_storeys = 12
#     elif gpr >= 1.6 and gpr < 2.1:
#         max_building_storeys = 24
#     elif gpr >= 2.1 and gpr < 2.8:
#         max_building_storeys = 36
#     elif gpr >= 2.8:
#         max_building_storeys = 48 ## by right got no limit
#     return max_building_storeys

def masked_rgb(simp_gpr):
    rgb = [0,0,0]
    if simp_gpr == 1.4:
        rgb = [0,255,0]
    elif simp_gpr == 1.6:
        rgb = [200,130,60]
    elif simp_gpr == 2.1:
        rgb = [255,255,0]
    elif simp_gpr == 2.8:
        rgb = [255,0,0]
    elif simp_gpr == 3.0:
        rgb =[0,0,255]
    return rgb

'''
pink, [255, 10, 169]
brown, [200,130,60]
cyan, [0,255,255]
red, [255,0,0]
black, [0,0,0]
green, [0,255,0]
blue, [0,0,255]
yellow, [255, 255, 0]
'''

# absolute_accuracies = []
# losses =[]
# images =[]
# sanity_ratios =[]

gprs =[]
generated_gprs =[]
sanity_ratios =[]

# Iterate through the images in the generated_image_path
for image_file in os.listdir(generated_image_path):
    if image_file.endswith('.png'):
        image_index = extract_numeric_part(image_file)

        # Construct the path for the corresponding masked image
        gt_mask_image_filename = f"{image_index}.png"
        gt_mask_image = os.path.join(gt_masked_image_path, gt_mask_image_filename)
        open_gt_mask_image = Image.open(gt_mask_image)
        mask_crop_box = (512, 0, 1024, 512) # right side
        mask_image = open_gt_mask_image.crop(mask_crop_box) #gt_mask is concatenated gt and mask
        gt_crop_box = (0, 0, 512, 512) # left side
        gt_image = open_gt_mask_image.crop(gt_crop_box)

        generated_image = os.path.join(generated_image_path, image_file)
        generated_image =  Image.open(generated_image)

        # Check if the image index matches any index in the CSV
        matched_row = data[data['key1'] == image_index]
        if not matched_row.empty:
            # Extract the GPR value for the matched row
            gpr_value = matched_row['GPR'].iloc[0]
            storey = matched_row['storeys'].iloc[0]
            simplified_gpr_value = matched_row['simp_gpr'].iloc[0]
            actual_site_area = matched_row['area'].iloc[0]
            actual_site_area = actual_site_area.replace(',', '')
            actual_site_area = float(actual_site_area[:-4])
            gpr_value = float(gpr_value)
            storey = int(storey)
            mask_array = np.array(mask_image)
            generated_array = np.array(generated_image)

            mask_color = masked_rgb(simplified_gpr_value)
            site_mask = create_binary_mask(mask_array, mask_color)
            site_area_array = generated_array.copy()
            site_area_array[~site_mask] = [255, 255, 255, 255] # making non-masked region white RMB ITS 4 CHANNELS NOW
            site_area_image = Image.fromarray(site_area_array)

            mask_color = [255, 10, 169] # pink
            building_mask = extract_building_regions(site_area_array, mask_color)
            buildings_image = Image.fromarray(building_mask)

            plt.figure(figsize=(20, 5))
            plt.subplot(1, 4, 1)
            plt.imshow(mask_image)
            plt.title('Mask Image')
            plt.axis('off')
            plt.subplot(1, 4, 2)
            plt.imshow(gt_image)
            plt.title('GT Image')
            plt.axis('off')
            plt.subplot(1, 4, 3)
            plt.imshow(generated_image)
            plt.title('Generated Image')
            plt.axis('off')
            plt.subplot(1, 4, 4)
            plt.imshow(buildings_image, cmap='gray')
            plt.title('Buildings Image')
            plt.axis('off')
            plt.show()

            # accuracy
            building_pixels = np.sum(building_mask)
            mask_pixels = np.sum(site_mask)
            msq_per_pixel = actual_site_area/mask_pixels
            building_area = msq_per_pixel * building_pixels
            #max_storeys = find_max_building_storeys(gpr_value)
            generated_gpr = building_area*storey/actual_site_area
            gprs.append(gpr_value)
            generated_gprs.append(generated_gpr)
            # if generated_gpr == 0:
            #     accuracy = 0
            # else:
            #     accuracy = (gpr_value - generated_gpr) / gpr_value #gpr_value is the target gpr
            # loss = 
            # images.append(image_file)
            # absolute_accuracy = abs(accuracy)
            # absolute_accuracies.append(absolute_accuracy)

            print(f'Image: {image_file}, GPR: {gpr_value}, Simplified GPR: {simplified_gpr_value}, Storeys:{storey},  Site area: {actual_site_area}, Building pixels: {building_pixels}, Mask pixels: {mask_pixels}, Generated GPR: {generated_gpr}')

            #sanity check. ratios should be about 0.75
            ratio = mask_pixels/actual_site_area
            sanity_ratios.append(ratio)



total_data = len(gprs)
accuracies = []
absolute_error =[]
square_error =[]
for tar_gpr, gen_gpr in zip(gprs, generated_gprs):
    accuracies.append(abs((tar_gpr-gen_gpr)/tar_gpr))
    absolute_error.append(abs(tar_gpr-gen_gpr))
    square_error.append((tar_gpr-gen_gpr)**2)
accuracy = sum(accuracies)/total_data
mean_abs_error = sum(absolute_error)/total_data
root_squared_error = math.sqrt(sum(square_error)/total_data)
print(f"Accuracies:{accuracies} \nSquare error:{square_error} \nAbsolute error:{absolute_error} ")
print(f"\nAccuracy:{accuracy} MAE:{mean_abs_error} RMSE:{root_squared_error}")

Image: 1040.png, GPR: 1.4, Simplified GPR: 1.4, Storeys:5,  Site area: 23065.1, Building pixels: 0, Mask pixels: 15996, Generated GPR: 0.0

Image: 1074.png, GPR: 2.5, Simplified GPR: 2.8, Storeys:12,  Site area: 37265.0, Building pixels: 0, Mask pixels: 27225, Generated GPR: 0.0

Image: 1076.png, GPR: 2.8, Simplified GPR: 2.8, Storeys:36,  Site area: 10414.2, Building pixels: 0, Mask pixels: 8425, Generated GPR: 0.0

Image: 1102.png, GPR: 1.6, Simplified GPR: 1.6, Storeys:12,  Site area: 6157.3, Building pixels: 0, Mask pixels: 4766, Generated GPR: 0.0

Image: 1180.png, GPR: 3.0, Simplified GPR: 3.0, Storeys:15,  Site area: 19547.0, Building pixels: 3092, Mask pixels: 14134, Generated GPR: 3.281448988255271

Image: 1379.png, GPR: 1.4, Simplified GPR: 1.4, Storeys:5,  Site area: 17455.9, Building pixels: 0, Mask pixels: 12042, Generated GPR: 0.0

Image: 145.png, GPR: 2.8, Simplified GPR: 2.8, Storeys:15,  Site area: 22094.4, Building pixels: 0, Mask pixels: 16092, Generated GPR: 0.0

Image: 1484.png, GPR: 3.0, Simplified GPR: 3.0, Storeys:17,  Site area: 10097.1, Building pixels: 1751, Mask pixels: 7503, Generated GPR: 3.9673463947754226

Image: 1602.png, GPR: 3.0, Simplified GPR: 3.0, Storeys:17,  Site area: 13564.8, Building pixels: 2106, Mask pixels: 9811, Generated GPR: 3.6491692997655694

Image: 1655.png, GPR: 2.1, Simplified GPR: 2.1, Storeys:18,  Site area: 27418.2, Building pixels: 0, Mask pixels: 21801, Generated GPR: 0.0